EP2764522B1 - Drahtlos wiederaufladbare batterie und komponenten davon - Google Patents

Drahtlos wiederaufladbare batterie und komponenten davon Download PDF

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Publication number
EP2764522B1
EP2764522B1 EP12837228.1A EP12837228A EP2764522B1 EP 2764522 B1 EP2764522 B1 EP 2764522B1 EP 12837228 A EP12837228 A EP 12837228A EP 2764522 B1 EP2764522 B1 EP 2764522B1
Authority
EP
European Patent Office
Prior art keywords
coils
rechargeable battery
coil
battery
wirelessly rechargeable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP12837228.1A
Other languages
English (en)
French (fr)
Other versions
EP2764522A1 (de
EP2764522A4 (de
Inventor
Hao Li
Saining Ren
Aijun QIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Apple Inc
Original Assignee
Apple Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Apple Inc filed Critical Apple Inc
Publication of EP2764522A1 publication Critical patent/EP2764522A1/de
Publication of EP2764522A4 publication Critical patent/EP2764522A4/de
Application granted granted Critical
Publication of EP2764522B1 publication Critical patent/EP2764522B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H02J5/005—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/025—
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F2003/005—Magnetic cores for receiving several windings with perpendicular axes, e.g. for antennae or inductive power transfer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • This invention relates to wirelessly rechargeable batteries. More particularly, although not exclusively, the invention relates to receiver coil topologies, battery shielding and demountable power receivers.
  • Wirelessly rechargeable batteries have been used in a range of devices, such as electric toothbrushes, for many years. Such devices typically employ non-standard batteries or are not easily replaceable. Common consumer batteries still typically require galvanic connections to effect recharging. There is a demand for consumer rechargeable batteries that may conveniently be charged wirelessly if placed in a charging region without requiring any special orientation or galvanic connection.
  • the power receiver of the battery prefferably be recyclable or reusable by consumers.
  • WO 2001/67046 discloses a wireless power receiver with three mutually orthogonal windings wound on a cross shaped core (i.e. the core is the shape of the origin of XYZ coordinate system.
  • US 5,281,941 discloses a spherical form for supporting three mutually orthogonal windings.
  • US 7,414,380 discloses a wireless power receiver with three mutually orthogonal wound on a parallipiped shaped core.
  • US 7,248,017 discloses a wirelessly rechargeable battery with a winding wound on a core outside the battery, or wound on a core and housed inside the battery. The axis of the winding is parallel to the longitudinal axis of the battery.
  • US 2011/0086256 discloses a wirelessly rechargeable battery with the receiver circuitry placed in one end of the battery, but the winding is on the outside of the battery.
  • US 2010/0181962 discloses a wirelessly rechargeable battery with a power receiver and an electrochemical cell within a battery case. The power receiver and electrochemical cell are not contained within respective demountable subcasings.
  • the above topologies are all somewhat bulky and/or have poor coupling in some orientations. Further, the above designs are integrally formed and do not allow easy reuse. Further, they do not provide shielding of the electrochemical cell.
  • a receiver coil assembly for a rechargeable battery including first and second coils having magnetic axes oriented transverse to one another; and a third coil having a magnetic axis transverse to the magnetic axes of the first and second coils and encompassing the first and second coils.
  • the first and second coils are preferably arranged in a cross with the first and second coils wound about arms of the cross and the third coil wound about the cross.
  • receiver coil assembly for a rechargeable battery including first, second and third coils having magnetic axes oriented transverse to one another, wherein one of the coils enables greater power transfer than the other coils.
  • the third coil preferably encompasses the other coils and the first and second coils are preferably in a cross arrangement.
  • the power transfer capacity of the third coil is preferably at least 10%, more preferably 20%, more than that of the first and second coils.
  • the length of the conductor of the third coil is preferably at least 25%, more preferably 50%, more than that of the first and second coils.
  • wirelessly rechargeable battery having a power receiver and an electrochemical cell wherein the power receiver is housed and contained within a first battery sub-casing and the electrochemical cell is housed and contained within a second battery sub-casing wherein the first and second sub-casings are demountable, and wherein the power receiver comprises a receiver coil assembly including a first coil and a second coil, the first and second coils having magnetic axes oriented transverse to one another.
  • the power receiver may be user-demountable from the electrochemical cell by virtue of a screw, push-fit or magnetic connection.
  • the electrochemical cell may be magnetically shielded by a metal layer about the electrochemical cell. This layer may be about one skin depth and may be formed of copper foil.
  • Figure 1 shows a wirelessly rechargeable battery of two part construction.
  • a power receiver is housed within a first battery sub-casing 2 and is demountable from a second battery sub-casing 3 which houses a rechargeable electrochemical cell.
  • the first battery sub-casing 2 and second battery sub-casing 3 may be interconnected by way of screw threads, a push-fit connection, magnetic coupling or the like to enable a user to detach the sub-casing 2 from sub-casing 3 and connect the removed sub-casing 2 to a new sub-casing containing a new electrochemical cell.
  • the electrochemical cell may be magnetically shielded to avoid overheating when the battery is located in a charging alternating magnetic field. This may be achieved by providing metal shielding about the electrochemical cell. This may take the form of a metal foil applied about the exterior of sub-casing 3. The metal foil may be of about one skin depth with copper being a desirable metal due its desirable shielding properties.
  • a receiver coil assembly according to one embodiment is shown.
  • a first winding 4a and 4b is wound about arms of cross-shaped ferrite core 6 and a second winding 5a and 5b is wound about the other arms of cross-shaped ferrite core 6.
  • a third winding 7 is wound about the perimeter of cross-shaped ferrite core 6.
  • the coils are orthogonal to one another to ensure coupling with a charging magnetic field in any orientation. However, in some applications the coils may not be orthogonal due to space constraints or preferential coupling orientations for particular applications.
  • the third coil is preferably annular so as to best conform to a cylindrical battery casing.
  • the third coil may be designed have greater power transfer capacity than the other coils. This may be desirable where the battery has a normal or preferred orientation so that the third coil typically supplies power at the fastest rate whereas the first and second coils still allow power transfer in other orientations.
  • the power transfer capacity of the third coil may be at least 10%, preferably 20% more than that of the first and second coils.
  • the length of the conductor of the third coil may be at least 25%, preferably 50% greater than the length of the first and second coil conductors.
  • the mean diameter of the outer coil is 12mm and has 50 turns whereas the mean diameter of the first and second windings is about 4mm and each has 80 turns.
  • the windings may all be 0.05mm gauge insulated copper wire.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Claims (8)

  1. Drahtlos wiederaufladbare Batterie (1), die einen Leistungsempfänger und eine elektrochemische Zelle (10) aufweist, dadurch gekennzeichnet, dass der Leistungsempfänger innerhalt eines ersten Batterieteilgehäuses (2) enthalten und untergebracht ist und die elektrochemische Zelle innerhalt eines zweiten Batterieteilgehäuses (3) enthalten und untergebracht ist und das erste und zweite Teilgehäuse abnehmbar sind; wobei der Leistungsempfänger eine Empfängerspulenanordnung umfasst, die eine erste und eine zweite Spule beinhaltet, wobei die erste und die zweite Spule magnetische Achsen aufweisen, die transversal zueinander orientiert sind; und eine dritte Spule, die eine magnetische Achse aufweist, die transversal zu den magnetischen Achsen der ersten und zweiten Spule orientiert ist und die erste und zweite Spule umgibt.
  2. Drahtlos wiederaufladbare Batterie (1) nach Anspruch 1, wobei die dritte Spule eine im Wesentlichen ringförmige Spule ist.
  3. Drahtlos wiederaufladbare Batterie (1) nach Anspruch 1 oder 2, ferner einen Ferrit-Kern umfassend, der innerhalb aller Spulen angeordnet ist, und wobei der Ferrit-Kern in Form eines Kreuzes vorliegt mit der ersten und der zweiten Spule um Arme des Kreuzes gewickelt und der dritten Spule um die distalen Enden der Arme des Kreuzes gewickelt.
  4. Drahtlos wiederaufladbare Batterie (1) nach irgendeinem der Ansprüch 1 bis 3, wobei eine der Spulen einen größeren Leistungstransfer ermöglicht als die anderen Spulen.
  5. Drahtlos wiederaufladbare Batterie (1) nach Anspruch 4, wobei die Spule, welche einen größeren Leistungstransfer ermöglicht als die anderen Spulen, eine längere Leitungslänge aufweist.
  6. Drahtlos wiederaufladbare Batterie (1) nach irgendeinem der vorhergehenden Ansprüche, wobei die abnehmbaren ersten und zweiten Batterieteilgehäuse durch eines oder durch eine Kombination von Folgendem zusammengehalten werden: Schrauben; Magnete; Steckkupplung.
  7. Drahtlos wiederaufladbare Batterie (1) nach irgendeinem der vorhergehenden Ansprüche, wobei die elektrochemische Zelle (10) magnetisch abgeschirmt ist.
  8. Drahtlos wiederaufladbare Batterie (1) nach Anspruch 7, wobei die elektrochemische Zelle (10) durch eine Metallschicht magnetisch abgeschirmt ist, die eine Tiefe aufweist, welche der Skin-Tiefe der Drahtlos-Frequenz entspricht, welche zum Laden der drahtlos wiederaufladbaren Batterie verwendet wird.
EP12837228.1A 2011-09-29 2012-09-24 Drahtlos wiederaufladbare batterie und komponenten davon Not-in-force EP2764522B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NZ59540311 2011-09-29
US201261640739P 2012-05-01 2012-05-01
PCT/NZ2012/000172 WO2013048261A1 (en) 2011-09-29 2012-09-24 Wirelessly rechargeable battery and components thereof

Publications (3)

Publication Number Publication Date
EP2764522A1 EP2764522A1 (de) 2014-08-13
EP2764522A4 EP2764522A4 (de) 2015-04-15
EP2764522B1 true EP2764522B1 (de) 2019-01-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12837228.1A Not-in-force EP2764522B1 (de) 2011-09-29 2012-09-24 Drahtlos wiederaufladbare batterie und komponenten davon

Country Status (6)

Country Link
US (3) US9735586B2 (de)
EP (1) EP2764522B1 (de)
JP (2) JP6100788B2 (de)
KR (1) KR101975839B1 (de)
CN (2) CN103827998B (de)
WO (1) WO2013048261A1 (de)

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US20170373508A1 (en) 2017-12-28
JP2017126571A (ja) 2017-07-20
WO2013048261A1 (en) 2013-04-04
US20180358815A1 (en) 2018-12-13
US10340705B2 (en) 2019-07-02
JP2014534558A (ja) 2014-12-18
EP2764522A1 (de) 2014-08-13
US9735586B2 (en) 2017-08-15
CN103827998B (zh) 2017-11-17
US10461543B2 (en) 2019-10-29
CN107705967A (zh) 2018-02-16
EP2764522A4 (de) 2015-04-15
CN103827998A (zh) 2014-05-28
KR20140065436A (ko) 2014-05-29
US20140225562A1 (en) 2014-08-14
KR101975839B1 (ko) 2019-05-09
JP6100788B2 (ja) 2017-03-22

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